Buffer Overflow Vulnerability in Google Brotli Decoder

CVE-2026-111497

What is CVE-2026-111497?

CVE-2026-111497 is a buffer overflow vulnerability found in the Brotli decoder, a component of the Google Brotli compression library, which is commonly used in various applications for efficient data compression. This vulnerability affects Brotli versions 1.0.3 through 1.2.0 across all platforms. An attacker exploiting this vulnerability can craft a specially formatted Brotli-compressed stream to potentially corrupt adjacent memory, leading to a variety of harmful outcomes. This includes the possibility of disclosing sensitive information from memory, causing a denial of service that could disrupt operations, and even executing arbitrary code remotely. Therefore, organizations utilizing affected versions of the Brotli library are at risk of severe security breaches that could impact data integrity and system availability.

Potential impact of CVE-2026-111497

1. Remote Code Execution: An attacker could exploit this vulnerability to execute arbitrary code on the affected system, leading to significant security breaches and unauthorized control over organizational infrastructure.

2. Denial of Service: The vulnerability can cause applications that utilize the Brotli decoder to crash or become unresponsive, resulting in a denial of service that impacts business operations and user accessibility.

3. Data Disclosure: By corrupting adjacent memory states, attackers may gain access to sensitive information stored in memory, potentially leading to data breaches that compromise confidential organizational data and violate compliance mandates.

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